hard water inlet

例句：

1. 1. Thehard water inlet is causing the pipesto become clogged.
   硬水入口导致管道堵塞。
2. 2. The engineer designed a special filterfor the hard water inlet.
   工程师为硬水入口设计了一种特殊的过滤器。
3. 3. To preventthe hard water inlet from contaminating the drinking water, we needto install a filtration system.
   为了防止硬水入口污染饮用水，我们需要安装一个过滤系统。